Sound-reproducer mounting



F. KOERBITZ.

SOUND REPRODUCER MOUNTING.

APPLlCATION FILED MAY 4, 1920.

1,387,410. PatentedAug. 9,1921.

F I INVENTOR. BY wfim A TTORNEY.

PATENT OFFICE.

I'RI'I'Z KOEBBITZ, OF SAN FRANCISCO, OAIJIORNJlA.

sounn-aa'rnonucaa uoun'rme."

Application ma Hay 4,1920. Serial No. 378,894.

To all whom it may concern .9

Be it known that'I, Fmrz KOERBITZ, a

v citizen of-the United States of America, re-

sidin at San Francisco, in the county of San rancisco and State of California, have invented new and useful Improvements in Sound-Reproducer Mountings, of which the following is a specification.

My invention relates to an improvement in mountings for sound recording and re: producing members used-in connection with phonographs, and has particular reference to a mounting on which is placed an improved sound reproducing member as a sub stitute for the ordinary stylus orneedle.

Animportant object of this invention is to (provide a sound reproducing member of lsk shape, which will answer the same purposes as a stylus or needle as used on a phonograph and yet have an additional advantage of longer duration in wear.

Much annoyance -has been experienced in the use of sound reproducing members because of the rapid wearin of the phonograph needle or stylus an the consequent frequent substitution of a new needle for This diflicult m invention overcomes by the use of t e isk shaped member and in addition to the features of preventing a re. id wearing of avsound reproducer and a so the deterioration of a phonograph record, has the advent e of giving forth a'better sound by provlding means whereby the periphery of the disk shaped sound reproducing member contacts with the phonograph record.

Another object of the invention is the provision of my impgoved mounting for the disk shaped mem 'r, which holds the disk shaped member in a fixed vertical position and provides means for a quick adjustment of a new disk shaped sound reproducing member when the same is desire A still further object of the invention is to provide a sound re roducing member with the improved form 0 mounting. of the above mentioned character, =which 1s simple in construction, inexpensive to manufacture, strong, durable, and reliable in operation.

Other ob'ects and advantages of my invention w' be ap arent during the course .of the following escription;

.In the acoompany' g drawings forming a part of this specification and in which hke numerals are employed to designate like parts-throughout the same, Figure 1, ice.

' front .elevation of the apparatus embodying Flg. 2, 1s a side elevation my invention. of my dGVlCQ'Wlth a conventional form of retain ng means for the shank shown partly n sectlon. Fig. 3, is a front elevation showmg the spindle released from one'of the arms of the bracket and pivoted to the other arm. F1 4, is an enlarged detail vertical Se0t10110 the disk shaped member mounted on the spindle and showing means for retaming the disk member in a vertical positlon, and Fig. 5, is a side elevation showing the slotted arm of the bracket and means for holdin the spindle pivoted.

In t e accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention the numeral 6 designates a shank suitably atpreferably threaded thereon, which bracket is held fixed on the shank 6 by means of a nut 8. It will be noted that the upper end of the shank can be suitabl attached to a connecting lever, which attac ent forms no part of my invention,"andthat the bracket 7.

Specification of Letters Patent. Patent d A 9 1921 v terminates in arms 9 and 10 which are slotted at 11 and 12 respectively, and which slotted portions receive the respective ends 13and 14 of a spindle 15. The spindle 15 is pivoted to the arm 10, by a fastenin 16 at one end thereof while it is detac fixed on the arm 9 by a suitable fastening hook 17.

As more clearly shown in Fig. 4 the spindle 15 has mounted thereon adjacent the end 14 an integral stop 18 while it is screw threaded adj acenttheother end 13 as shown at 19 to receive an adjustable stop 20. Before the stop 20 is adjusted on the spindle 15 my improved sound reproducing member 21 of a disk shape is placed upon the spindle 15 and the adjustable stop 20 when placed on the spindle acts in conjunction with the integral stop 18 and holds the sound reproducing member in a vertical position as its circular edge rests in a groove of a phonograph record as it travels over the record .and reproduces the sound waves.

The operation in adjusting the disk shaped member in posltion for use in connection with a phonograph record is as follows :The shank 6 is attached to a lever is released from the fastening hook 17 and the adjustable nut 20 is unscrewed from the threaded portion 19 of the spindle 15. After this step the disk shaped member 21 is placed on the. spindle and rests against the rounded edge of the integral stop 18. The adjustable stop isthen screwed onto the spindle 15 until it takes a position almost touching: the disk 21. After the disk is in position the free end 13 of the spindle 16 is fastened to aunt) and is there held in 1s andthe adjustable stop 20 tend to hold position. It will thus be observed as mentioned before, that the fixed integral stop the disk 21 in a vertical position and will prevent a lateral movement of the disk member 21 as it travels over the record of a phonograph the act of reproducing sound.

The construction as set forthrin Fig. 2, showing a lever arm 22, a link 23, a set screw 24 511111 a diaphragm 25 illustrate the manner in -Wl110l1 my improved mounting may-be connected with a phonograph and it is to be understood that no claims of novelty are made for these particular features.

It is hereby understood that the form of invention herewith shown and described is to be taken as a preferred embodiment of the same, and that various changes inthe shape, size, and arrangement of parts may be resorted to without departing from the.

spirit of the invention or the scope of the sub'oined' claims. I

aving thus described my invention I claim 1. A stylus mounting comprising a shank,

a bracket secured to said shank and terminating in slotted arms, a spindle pivoted at one end to one arm of said bracket, and detachably fastened to the other arm of said bracket, a disk shaped sound reproducing member mounted on said spindle, and stops on said spindle to retain said sound reproducing member in a vertical position, one of said stops being integral with said spindle,

and the other of said stops being adjustable a vertical position with relation to a phonograph record, and means for fastening the freeend of the spindle to the other arm of said bracket.

In testimony whereof I afix my signature.

. FRITZ KOERBITZ. 

